package com.example.demo.demos.web.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.authority.AuthorityUtils;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.stereotype.Service;

import java.util.ArrayList;

/**
 * UserDetailsService 自定义实现类
 */
@Service
public class UserDetailsServiceImpl implements UserDetailsService {

    @Autowired
    private PasswordEncoder passwordEncoder;


    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        System.out.println("UserDetailsServiceImpl.loadUserByUsername");
        //1.查询数据库判断用户名是否存在，如果不存在就会抛出UsernameNotFoundException异常
        if(!"admin".equals(username)) {
            throw new UsernameNotFoundException("用户名不存在");
        }
        String password = passwordEncoder.encode("123456");
        //2.把查询出来的密码（注册时已经加密过）进行解析，或者直接把密码放入构造方法
        return new User(username,password, AuthorityUtils.commaSeparatedStringToAuthorityList("admin,normal,ROLE_normal"));
    }
}
